TWI571846B - A display touch panel with a composite circuit - Google Patents
A display touch panel with a composite circuit Download PDFInfo
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- TWI571846B TWI571846B TW104117315A TW104117315A TWI571846B TW I571846 B TWI571846 B TW I571846B TW 104117315 A TW104117315 A TW 104117315A TW 104117315 A TW104117315 A TW 104117315A TW I571846 B TWI571846 B TW I571846B
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Description
本發明係關於一種顯示觸控面板，尤其是關於一種顯示觸控面板的複合驅動電路。 The present invention relates to a display touch panel, and more particularly to a composite drive circuit for displaying a touch panel.
按，觸控顯示技術正在快速演進，孕育多年的觸控顯示技術包括單層玻璃式、單層透明電極多點式與On cell/In cell等等。在一個觸控面板上通常會有顯示電路及觸控電路，而顯示驅動訊號與觸控驅動訊號差異甚大，所以顯示驅動訊號與觸控驅動訊號通常分別由顯示電路與觸控電路各自產生。但是顯示驅動訊號與觸控驅動訊號由不同電路產生，代表必須佔據較多的電路佈局面積。因此，若能將顯示電路及觸控電路整合在一起，勢必會大幅降低產品的成本。 According to the touch display technology, the touch display technology has been developed for many years, including single-layer glass type, single-layer transparent electrode multi-point type and On cell/In cell. There is usually a display circuit and a touch circuit on a touch panel, and the display drive signal and the touch drive signal are greatly different. Therefore, the display drive signal and the touch drive signal are generally generated by the display circuit and the touch circuit, respectively. However, the display driving signal and the touch driving signal are generated by different circuits, which means that the circuit layout area must be occupied. Therefore, if the display circuit and the touch circuit can be integrated, the cost of the product will be greatly reduced.
鑒於上述問題，本發明提出顯示觸控面板之複合驅動電路的技術。 In view of the above problems, the present invention proposes a technique of displaying a composite driving circuit of a touch panel.
本發明之目的之一，為提供一種複合驅動電路，其可以縮減顯示觸控面板的電路面積。 One of the objects of the present invention is to provide a composite driving circuit that can reduce the circuit area of a display touch panel.
本發明之目的之一，為提供一升壓電路，其可以降低一般升壓電路的電路面積，並符合高頻率的驅動時脈。 One of the objects of the present invention is to provide a booster circuit that can reduce the circuit area of a general boost circuit and conform to a high frequency drive clock.
為達以上目的，本發明提供一種顯示觸控面板的複合驅動電路，複合驅動電路包含一掃描電路、一顯示觸控電路及一升壓電路。掃描電路產生複數掃描訊號，該些掃描訊號掃描複數像素；顯示觸控電路耦接掃描電路，接收該些掃描訊號以產生一導通訊號；及升壓電路耦接掃描電路及顯示觸控電路，接收該些掃描訊號以提供一低電位路徑，升壓電路由該低電位路徑提升該導通訊號的準位，其中導通訊號用於產生一驅動訊號，驅動該顯示觸控面板。 To achieve the above objective, the present invention provides a composite driving circuit for displaying a touch panel, the composite driving circuit comprising a scanning circuit, a display touch circuit and a boosting circuit. The scan circuit generates a plurality of scan signals, the scan signals scan the plurality of pixels; the display touch circuit is coupled to the scan circuit, and receives the scan signals to generate a lead communication number; and the boost circuit is coupled to the scan circuit and the display touch circuit to receive The scan signals provide a low potential path, and the boost circuit boosts the level of the communication signal by the low potential path, wherein the communication signal is used to generate a driving signal to drive the display touch panel.
1‧‧‧顯示觸控面板 1‧‧‧ display touch panel
10‧‧‧顯示觸控區域 10‧‧‧Display touch area
20‧‧‧複合驅動電路 20‧‧‧Composite drive circuit
30‧‧‧掃描電路 30‧‧‧Scan circuit
40‧‧‧顯示觸控電路 40‧‧‧Display touch circuit
50‧‧‧訊號產生電路 50‧‧‧Signal generation circuit
60‧‧‧觸控電路 60‧‧‧ touch circuit
61‧‧‧輸入電路 61‧‧‧Input circuit
62‧‧‧輸出電路 62‧‧‧Output circuit
63‧‧‧放電電路 63‧‧‧Discharge circuit
70‧‧‧共用電路 70‧‧‧Common circuit
71‧‧‧輸入電路 71‧‧‧Input circuit
72‧‧‧輸出電路 72‧‧‧Output circuit
73‧‧‧放電電路 73‧‧‧Discharge circuit
80‧‧‧升壓電路 80‧‧‧ boost circuit
A‧‧‧節點 A‧‧‧ node
C‧‧‧節點 C‧‧‧ node
Cb‧‧‧自舉電容 Cb‧‧‧ bootstrap capacitor
COM‧‧‧顯示訊號 COM‧‧‧ display signal
DRI‧‧‧驅動時脈 DRI‧‧‧ drive clock
DRI1‧‧‧驅動訊號 DRI1‧‧‧ drive signal
G10‧‧‧第n掃描訊號 G10‧‧‧nth scan signal
G12‧‧‧第n+1掃描訊號 G12‧‧‧n+1 scan signal
G30‧‧‧第n+2掃描訊號 G30‧‧‧n+2 scan signal
M1‧‧‧電晶體 M1‧‧‧O crystal
M2‧‧‧電晶體 M2‧‧‧O crystal
M3‧‧‧電晶體 M3‧‧‧O crystal
M4‧‧‧升壓電晶體 M4‧‧‧Boost transistor
M5‧‧‧電晶體 M5‧‧‧O crystal
M21‧‧‧電晶體 M21‧‧•O crystal
M22‧‧‧電晶體 M22‧‧‧O crystal
M23‧‧‧電晶體 M23‧‧‧O crystal
OUT‧‧‧輸出端 OUT‧‧‧ output
T1‧‧‧第一區間 T1‧‧‧ first interval
T2‧‧‧第二區間 T2‧‧‧Second interval
T3‧‧‧第三區間 T3‧‧‧ third interval
T4‧‧‧第四區間 T4‧‧‧4th interval
T5‧‧‧第五區間 T5‧‧‧ fifth interval
VDD‧‧‧第一電源 V DD ‧‧‧First power supply
VON1‧‧‧第一導通訊號 V ON1 ‧‧‧First Communication Number
VON2‧‧‧第二導通訊號 V ON2 ‧‧‧Secondary communication number
VSS‧‧‧第二電源 V SS ‧‧‧second power supply
第一圖：其係為本發明之顯示觸控面板之一實施例的電路圖；第二圖：其係為本發明之複合驅動電路之一實施例的電路圖；及第三圖：其係為本發明之複合驅動電路之一實施例的時序圖。 1 is a circuit diagram of an embodiment of a display touch panel of the present invention; FIG. 2 is a circuit diagram of an embodiment of a composite drive circuit of the present invention; and a third diagram: A timing diagram of one embodiment of the inventive composite drive circuit.
為使 貴審查委員對本發明之特徵及所達成之功效有更進一步之瞭解與認識，謹佐以實施例及配合詳細之說明，說明如後： In order to give your reviewers a better understanding and understanding of the features and effects of the present invention, please refer to the examples and the detailed descriptions, as explained below:
請參閱第一圖，其係為本發明之顯示觸控面板之一實施例的電路圖。如圖所示，顯示觸控面板1的電路包含一複合驅動電路20及一訊號產生電路50，訊號產生電路50產生一驅動時脈DRI與一顯示訊號COM至複合驅動電路20，複合驅動電路20產生複數掃描訊號G10、G12、G30、驅動訊號DRI1及顯示訊號COM至一顯示觸控區域10，以使顯示觸控區域10可以顯示一畫面並具有觸控功能。 Please refer to the first figure, which is a circuit diagram of an embodiment of the display touch panel of the present invention. As shown in the figure, the circuit of the touch panel 1 includes a composite driving circuit 20 and a signal generating circuit 50. The signal generating circuit 50 generates a driving clock DRI and a display signal COM to the composite driving circuit 20, and the composite driving circuit 20 The plurality of scanning signals G10, G12, G30, the driving signal DRI1 and the display signal COM are generated to display the touch area 10, so that the display touch area 10 can display a picture and have a touch function.
再者，本發明的複合驅動電路20包含一掃描電路30、一顯示觸控電路40及一升壓電路80。顯示觸控電路40耦接顯示觸控區域10、掃描電路30、訊號產生電路50與升壓電路80，升壓電路80耦接掃 描電路30。掃描電路30產生的該些掃描訊號G10、G12、G30除了掃描顯示觸控區域10的複數像素，更控制顯示觸控電路40與升壓電路80的運作。升壓電路80可以使顯示觸控電路40的運作符合高頻率(例如：100KHz)的驅動時脈DRI，而顯示觸控電路40可以依據輸出驅動時脈DRI產生驅動訊號DRI1，以驅動觸控功能。此外，顯示觸控電路40更可以輸出顯示訊號COM至顯示觸控區域10，以顯示畫面。如此，本發明的顯示觸控電路40可以使顯示觸控區域10執行顯示與觸控的工作。 Furthermore, the composite driving circuit 20 of the present invention comprises a scanning circuit 30, a display touch circuit 40 and a boosting circuit 80. The display touch circuit 40 is coupled to the display touch area 10, the scan circuit 30, the signal generation circuit 50 and the boost circuit 80, and the boost circuit 80 is coupled to the scan circuit. Trace circuit 30. The scanning signals G10, G12, and G30 generated by the scanning circuit 30 not only scan and display the plurality of pixels of the touch area 10, but also control the operation of the display touch circuit 40 and the boosting circuit 80. The boosting circuit 80 can make the operation of the display touch circuit 40 conform to the driving clock DRI of a high frequency (for example, 100 KHz), and the display touch circuit 40 can generate the driving signal DRI1 according to the output driving clock DRI to drive the touch function. . In addition, the display touch circuit 40 can further output the display signal COM to the display touch area 10 to display the picture. As such, the display touch circuit 40 of the present invention can cause the display touch area 10 to perform display and touch operations.
復請參閱第一圖，顯示觸控電路40接收該些掃描訊號G10、G12、G30，顯示觸控電路40依據該些掃描訊號G10、G12、G30於一輸出端OUT產生顯示訊號COM，以顯示畫面；且顯示觸控電路40依據該些掃描訊號G10、G12、G30於輸出端OUT產生驅動訊號DRI1，以控制觸控功能。 Referring to the first figure, the display touch circuit 40 receives the scan signals G10, G12, and G30, and the display touch circuit 40 generates a display signal COM according to the scan signals G10, G12, and G30 at an output terminal OUT to display The display circuit 40 generates a driving signal DRI1 at the output terminal OUT according to the scanning signals G10, G12, and G30 to control the touch function.
請參閱第二圖，其係為本發明之複合驅動電路之一實施例的電路圖。同時參閱第一圖，其中，顯示觸控電路40包含一觸控電路60與一共用電路70，觸控電路60耦接升壓電路80，升壓電路80控制觸控電路60而使其可以應用於高頻率的驅動時脈DRI之下。換言之，顯示觸控電路40耦接共用電極，並依據第n掃描訊號G10及驅動時脈DRI輸出驅動訊號DRI1至共用電極，或顯示觸控電路40依據第n+2掃描訊號G30輸出顯示訊號COM至共用電極。 Please refer to the second figure, which is a circuit diagram of an embodiment of the composite driving circuit of the present invention. Referring to the first figure, the touch control circuit 40 includes a touch circuit 60 and a shared circuit 70. The touch circuit 60 is coupled to the boost circuit 80. The boost circuit 80 controls the touch circuit 60 to make it applicable. At high frequency drive clock DRI. In other words, the display touch circuit 40 is coupled to the common electrode, and outputs the driving signal DRI1 to the common electrode according to the nth scanning signal G10 and the driving clock DRI, or the display touch circuit 40 outputs the display signal COM according to the n+2 scanning signal G30. To the common electrode.
此外，觸控電路60與共用電路70的輸出端OUT為同一個輸出端，所以當面板處於觸控階段時，觸控電路60會經由輸出端OUT輸出驅動訊號DRI1至共用電極，當面板處於顯示階段時，共用電路70會經由輸出端OUT輸出顯示訊號COM至共用電極。如此，驅動訊號 DRI1與顯示訊號COM不會相互干擾，且可以達到一個電路(顯示觸控電路40)產生驅動訊號DRI1與顯示訊號COM，而縮減顯示觸控面板1的電路佈局面積。 In addition, the touch circuit 60 and the output terminal OUT of the shared circuit 70 are the same output end. Therefore, when the panel is in the touch phase, the touch circuit 60 outputs the driving signal DRI1 to the common electrode via the output terminal OUT when the panel is displayed. At the stage, the sharing circuit 70 outputs the display signal COM to the common electrode via the output terminal OUT. So, the drive signal The DRI1 and the display signal COM do not interfere with each other, and a circuit (display touch circuit 40) can be generated to generate the driving signal DRI1 and the display signal COM, and the circuit layout area of the touch panel 1 can be reduced.
復參閱第二圖，觸控電路60包含一輸入電路61、一輸出電路62與一放電電路63，觸控電路60耦接掃描電路30、訊號產生電路50及共用電極，並依據第n掃描訊號G10及驅動時脈DRI輸出驅動訊號DRI1至共用電極。其中，輸入電路61耦接掃描電路30與第一電源VDD，輸入電路61依據第一電源VDD與第n掃描訊號G10產生一第一導通訊號VON1。其中，輸入電路61可以為一電晶體M1，電晶體M1耦接於第一電源VDD與放電電路63之間。輸出電路62耦接輸入電路61，並接收第一導通訊號VON1與驅動時脈DRI；輸出電路62依據第一導通訊號VON1與驅動時脈DRI，而於輸出端OUT產生驅動訊號DRI1；輸出電路62可以為一電晶體M2，電晶體M2耦接於驅動時脈DRI與輸出端OUT之間。其中，第一導通訊號VON1用於產生驅動訊號DRI1，以驅動顯示觸控面板1。 Referring to the second figure, the touch circuit 60 includes an input circuit 61, an output circuit 62, and a discharge circuit 63. The touch circuit 60 is coupled to the scan circuit 30, the signal generation circuit 50, and the common electrode, and is based on the nth scan signal. G10 and drive clock DRI output drive signal DRI1 to the common electrode. The input circuit 61 is coupled to the scan circuit 30 and the first power source V DD . The input circuit 61 generates a first communication number V ON1 according to the first power source V DD and the nth scan signal G10. The input circuit 61 can be a transistor M1, and the transistor M1 is coupled between the first power source V DD and the discharge circuit 63. The output circuit 62 is coupled to the input circuit 61 and receives the first pilot communication number V ON1 and the driving clock DRI; the output circuit 62 generates the driving signal DRI1 at the output terminal OUT according to the first pilot communication number V ON1 and the driving clock DRI; The circuit 62 can be a transistor M2, and the transistor M2 is coupled between the driving clock DRI and the output terminal OUT. The first communication number V ON1 is used to generate the driving signal DRI1 to drive the display of the touch panel 1 .
再者，為了輸出電路62可以完整的輸出驅動時脈DRI，本發明的升壓電路80控制第一導通訊號VON1的準位，即升壓電路80提升第一導通訊號VON1的準位，如此輸出電路62可以符合高頻率驅動時脈DRI的需求。升壓電路80包含一自舉電容Cb、一電晶體M3與一升壓電晶體M4，自舉電容Cb具有一第一端及一第二端，第一端耦接顯示觸控電路40，儲存第一導通訊號VON1，第二端耦接電晶體M3，所以自舉電容Cb耦接於第一導通訊號VON1與電晶體M3之間，電晶體M3並聯於升壓電晶體M4且接收第n掃描訊號G10。因此，升壓電路80接收的第n掃描訊號G10控制電晶體M3導通而提供一低電 位路徑予自舉電容Cb，則自舉電容Cb的第二端為低電位，而自舉電容Cb第一端的準位為第一導通訊號VON1的準位。 Furthermore, in order for the output circuit 62 to be able to drive the clock DRI completely, the boosting circuit 80 of the present invention controls the level of the first pilot communication number V ON1 , that is, the boosting circuit 80 raises the level of the first pilot communication number V ON1 . Such an output circuit 62 can meet the demand for high frequency drive clock DRI. The boosting circuit 80 includes a bootstrap capacitor Cb, a transistor M3 and a boosting transistor M4. The bootstrap capacitor Cb has a first end and a second end. The first end is coupled to the display touch circuit 40 for storage. The first communication number is V ON1 , and the second end is coupled to the transistor M3. Therefore, the bootstrap capacitor Cb is coupled between the first communication signal V ON1 and the transistor M3 , and the transistor M3 is connected in parallel to the boost transistor M4 and receives the first n scan signal G10. Therefore, the nth scan signal G10 received by the boosting circuit 80 controls the transistor M3 to be turned on to provide a low potential path to the bootstrap capacitor Cb, and the second end of the bootstrap capacitor Cb is low, and the bootstrap capacitor Cb is first. The level of the terminal is the level of the first pilot communication number V ON1 .
承接上述，升壓電晶體M4具有一第一端、一第二端及一第三端，第一端耦接第二端，第二端耦接掃描電路30且接收第n+1掃描訊號G12，第三端耦接電晶體M3與自舉電容Cb。當欲提升自舉電容Cb第一端的準位時，第n+1掃描訊號G12為高準位且導通升壓電晶體M4，如此第n+1掃描訊號G12從低電位路徑(電晶體M3)向自舉電容Cb的第二端充電，則自舉電容Cb第一端的準位提升為第一導通訊號VON1的準位加上第n+1掃描訊號G12的準位。故，掃描電路30依據第n+1掃描訊號G12控制升壓電晶體M4由低電位路徑充電自舉電容Cb，以提升第一導通訊號VON1的準位。換言之，觸控電路60可以因節點A的準位提升而完整的輸出驅動時脈DRI的準位。 In the above, the boosting transistor M4 has a first end, a second end, and a third end. The first end is coupled to the second end, and the second end is coupled to the scan circuit 30 and receives the n+1th scan signal G12. The third end is coupled to the transistor M3 and the bootstrap capacitor Cb. When the level of the first end of the bootstrap capacitor Cb is to be increased, the n+1th scan signal G12 is at a high level and the boosting transistor M4 is turned on, so that the n+1th scan signal G12 is from the low potential path (the transistor M3) When charging the second end of the bootstrap capacitor Cb, the level of the first end of the bootstrap capacitor Cb is raised to the level of the first pilot signal VON1 plus the level of the n+ 1th scan signal G12. Therefore, the scan circuit 30 controls the boost transistor M4 to charge the bootstrap capacitor Cb from the low potential path according to the n+1th scan signal G12 to increase the level of the first pilot communication number V ON1 . In other words, the touch circuit 60 can completely drive the level of the driving pulse DRI due to the level increase of the node A.
復參閱第二圖，於顯示觸控面板1從觸控階段進入顯示階段時，觸控電路60的放電電路63接收第n+2掃描訊號G30，以控制放電電路63降低第一導通訊號VON1的準位，如此輸出電路62不會再依據驅動時脈DRI產生驅動訊號DRI1。此外放電電路63可以為一電晶體M5，電晶體M5耦接於輸入電路61與第二電源VSS之間。電晶體M5使節點A的準位降低至第二電源VSS的準位。 Referring to the second figure, when the touch panel 1 is displayed from the touch phase to the display phase, the discharge circuit 63 of the touch circuit 60 receives the n+2 scan signal G30 to control the discharge circuit 63 to lower the first communication number V ON1. The level of the output circuit 62 does not generate the driving signal DRI1 according to the driving clock DRI. In addition, the discharge circuit 63 can be a transistor M5, and the transistor M5 is coupled between the input circuit 61 and the second power source VSS. The transistor M5 lowers the level of the node A to the level of the second power source VSS.
然而，當顯示觸控面板1從顯示階段改為觸控階段時，共用電路70的放電電路73接收第n掃描訊號G10，並以第n掃描訊號G10控制放電電路73而降低第二導通訊號VON2的準位，所以放電電路73依據第n掃描訊號G10降低節點C的準位，如此輸出電路72不會再輸出顯示訊號COM。換言之，當該些掃描訊號G10、G12、G30掃描複數像素(顯示觸控區域10)時，顯示觸控電路40輸出顯示訊號 COM，當該些掃描訊號G10、G12、G30未掃描複數像素10時，顯示觸控電路40輸出驅動訊號DRI。 However, when the touch panel 1 is changed from the display phase to the touch phase, the discharge circuit 73 of the sharing circuit 70 receives the nth scan signal G10, and controls the discharge circuit 73 with the nth scan signal G10 to lower the second communication number V. The level of ON2 is such that the discharge circuit 73 lowers the level of the node C according to the nth scan signal G10, so that the output circuit 72 does not output the display signal COM. In other words, when the scanning signals G10, G12, and G30 scan the plurality of pixels (displaying the touch area 10), the display touch circuit 40 outputs the display signal COM when the scanning signals G10, G12, and G30 are not scanning the plurality of pixels 10. The display touch circuit 40 outputs a driving signal DRI.
承接上述，於顯示階段改為共用電路70開始工作，共用電路70包含一輸入電路71、一輸出電路72與一放電電路73，共用電路70耦接掃描電路30、觸控電路60、訊號產生電路50及共用電極，並依據第n+2掃描訊號G30輸出顯示訊號COM至共用電極。其中，輸入電路71耦接掃描電路30，並接收第n+2掃描訊號G30與第一電源VDD，第n+2掃描訊號G30控制輸入電路71依據第一電源VDD產生一第二導通訊號VON2，即輸入電路71依據第n+2掃描訊號G30與第一電源VDD產生一第二導通訊號VON2。輸出電路72耦接共用電極，並接收第二導通訊號VON2與顯示訊號COM，第二導通訊號VON2控制輸出電路72將顯示訊號COM輸出至共用電極，所以輸出電路72依據第二導通訊號VON2輸出顯示訊號COM至共用電極。其中，輸入電路71可以為一電晶體M21，輸出電路72可以為一電晶體M22及放電電路73可以為一電晶體M23，其餘技術與輸入電路61、輸出電路62及放電電路63相似，不再複述。 In the display phase, the shared circuit 70 is started to operate. The common circuit 70 includes an input circuit 71, an output circuit 72, and a discharge circuit 73. The common circuit 70 is coupled to the scan circuit 30, the touch circuit 60, and the signal generation circuit. 50 and the common electrode, and outputting the display signal COM to the common electrode according to the n+2 scan signal G30. The input circuit 71 is coupled to the scan circuit 30, and receives the n+2 scan signal G30 and the first power source V DD . The n+2 scan signal G30 controls the input circuit 71 to generate a second communication number according to the first power source V DD . V ON2 , that is, the input circuit 71 generates a second pilot communication number V ON 2 according to the n+2 scan signal G30 and the first power source V DD . The output circuit 72 is coupled to the common electrode, and receives the second communication number V ON2 and the display signal COM. The second communication signal V ON2 controls the output circuit 72 to output the display signal COM to the common electrode, so the output circuit 72 is based on the second communication number V. The ON2 output displays the signal COM to the common electrode. The input circuit 71 can be a transistor M21, the output circuit 72 can be a transistor M22, and the discharge circuit 73 can be a transistor M23. The rest of the technology is similar to the input circuit 61, the output circuit 62, and the discharge circuit 63. repeat.
請參閱第三圖，其係為本發明之複合驅動電路之一實施例的時序圖。請一併參閱第二圖與第三圖，於第一區間T1，第n掃描訊號G10為高準位，電晶體M1、電晶體M3與電晶體M23為導通狀態，節點A的準位被充電至第一電源VDD的準位，節點C被降低至第二電源VSS；第一導通訊號VON1為第一電源VDD的準位，電晶體M2導通，其中節點A為浮動電位；此時輸出端OUT依據驅動時脈DRI輸出驅動訊號DRI1，且驅動訊號DRI1的準位低於驅動時脈DRI的準位。於第二區間T2，第n+1掃描訊號G12改變為高準位，升壓電晶體M4導 通，且第n+1掃描訊號G12經由低電位路徑向自舉電容Cb充電，如此節點A的準位提升至第一電源VDD加上第n+1掃描訊號G12的準位，此時輸出端OUT可以完整輸出驅動時脈DRI的準位。 Please refer to the third figure, which is a timing diagram of an embodiment of the composite driving circuit of the present invention. Referring to the second and third figures together, in the first interval T1, the nth scanning signal G10 is at a high level, the transistor M1, the transistor M3 and the transistor M23 are in a conducting state, and the level of the node A is charged. Up to the level of the first power source V DD , the node C is lowered to the second power source V SS ; the first pilot communication number V ON1 is the level of the first power source V DD , and the transistor M2 is turned on, wherein the node A is a floating potential; The output terminal OUT outputs the driving signal DRI1 according to the driving clock DRI, and the level of the driving signal DRI1 is lower than the level of the driving clock DRI. In the second interval T2, the n+1th scan signal G12 is changed to a high level, the boosting transistor M4 is turned on, and the n+1th scan signal G12 is charged to the bootstrap capacitor Cb via the low potential path, so that the node A is accurate. The bit is boosted to the level of the first power supply V DD plus the n+1th scan signal G12, at which time the output terminal OUT can completely output the level of the driving clock DRI.
於第三區間T3，顯示觸控面板1處於可以執行觸控功能的階段，且共用電路70不會於輸出端OUT輸出顯示訊號COM。於第四區間T4，第n+2掃描訊號G30為高準位，電晶體M21與電晶體M5為導通狀態，節點C的準位被充電至第一電源VDD的準位，節點A被放電至第二電源VSS的準位；第二導通訊號VON2控制電晶體M22導通而於輸出端OUT輸出顯示訊號COM。於第五區間T5，顯示觸控面板1處於可以顯示畫面的階段，且觸控電路60不會於輸出端OUT輸出驅動訊號DRI1。後續電路動作與第一區間T1至第五區間T5相同，不再覆述。 In the third interval T3, the touch panel 1 is displayed in a stage where the touch function can be executed, and the sharing circuit 70 does not output the display signal COM at the output terminal OUT. In the fourth interval T4, the n+2 scan signal G30 is at a high level, the transistor M21 and the transistor M5 are in an on state, the level of the node C is charged to the level of the first power source V DD , and the node A is discharged. The level of the second power source V SS is controlled; the second channel communication number V ON2 controls the transistor M22 to be turned on and the output terminal OUT outputs the display signal COM. In the fifth interval T5, the touch panel 1 is displayed at a stage where the screen can be displayed, and the touch circuit 60 does not output the driving signal DRI1 at the output terminal OUT. Subsequent circuit operations are the same as the first interval T1 to the fifth interval T5, and are not repeated.
綜上所述，本發明係一種顯示觸控面板的複合驅動電路，複合驅動電路包含一掃描電路、一顯示觸控電路及一升壓電路。掃描電路產生複數掃描訊號，該些掃描訊號掃描複數像素；顯示觸控電路耦接掃描電路，接收該些掃描訊號以產生一導通訊號；及升壓電路耦接掃描電路及顯示觸控電路，接收該些掃描訊號以提供一低電位路徑，升壓電路由該低電位路徑提升該導通訊號的準位，其中導通訊號用於產生一驅動訊號，驅動該顯示觸控面板。 In summary, the present invention is a composite driving circuit for displaying a touch panel. The composite driving circuit includes a scanning circuit, a display touch circuit, and a boosting circuit. The scan circuit generates a plurality of scan signals, the scan signals scan the plurality of pixels; the display touch circuit is coupled to the scan circuit, and receives the scan signals to generate a lead communication number; and the boost circuit is coupled to the scan circuit and the display touch circuit to receive The scan signals provide a low potential path, and the boost circuit boosts the level of the communication signal by the low potential path, wherein the communication signal is used to generate a driving signal to drive the display touch panel.
60‧‧‧觸控電路 60‧‧‧ touch circuit
61‧‧‧輸入電路 61‧‧‧Input circuit
62‧‧‧輸出電路 62‧‧‧Output circuit
63‧‧‧放電電路 63‧‧‧Discharge circuit
70‧‧‧共用電路 70‧‧‧Common circuit
71‧‧‧輸入電路 71‧‧‧Input circuit
72‧‧‧輸出電路 72‧‧‧Output circuit
73‧‧‧放電電路 73‧‧‧Discharge circuit
80‧‧‧升壓電路 80‧‧‧ boost circuit
A‧‧‧節點 A‧‧‧ node
C‧‧‧節點 C‧‧‧ node
Cb‧‧‧自舉電容 Cb‧‧‧ bootstrap capacitor
COM‧‧‧顯示訊號 COM‧‧‧ display signal
DRI‧‧‧驅動時脈 DRI‧‧‧ drive clock
G10‧‧‧第n掃描訊號 G10‧‧‧nth scan signal
G12‧‧‧第n+1掃描訊號 G12‧‧‧n+1 scan signal
G30‧‧‧第n+2掃描訊號 G30‧‧‧n+2 scan signal
M1‧‧‧電晶體 M1‧‧‧O crystal
M2‧‧‧電晶體 M2‧‧‧O crystal
M3‧‧‧電晶體 M3‧‧‧O crystal
M4‧‧‧升壓電晶體 M4‧‧‧Boost transistor
M5‧‧‧電晶體 M5‧‧‧O crystal
M21‧‧‧電晶體 M21‧‧•O crystal
M22‧‧‧電晶體 M22‧‧‧O crystal
M23‧‧‧電晶體 M23‧‧‧O crystal
OUT‧‧‧輸出端 OUT‧‧‧ output
VDD‧‧‧第一電源 V DD ‧‧‧First power supply
VON1‧‧‧第一導通訊號 V ON1 ‧‧‧First Communication Number
VON2‧‧‧第二導通訊號 V ON2 ‧‧‧Secondary communication number
VSS‧‧‧第二電源 V SS ‧‧‧second power supply
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| CN102929460A (en) * | 2012-08-31 | 2013-02-13 | 友达光电股份有限公司 | Touch display device and display driving method |
| TW201310460A (en) * | 2011-04-21 | 2013-03-01 | Semiconductor Energy Lab | Signal processing circuit |
| CN104615291A (en) * | 2013-11-04 | 2015-05-13 | 凌巨科技股份有限公司 | Composite driving circuit for display touch panel |
| TWM528507U (en) * | 2015-05-29 | 2016-09-11 | 凌巨科技股份有限公司 | A display touch panel with a composite circuit |
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| TW201310460A (en) * | 2011-04-21 | 2013-03-01 | Semiconductor Energy Lab | Signal processing circuit |
| CN102929460A (en) * | 2012-08-31 | 2013-02-13 | 友达光电股份有限公司 | Touch display device and display driving method |
| CN104615291A (en) * | 2013-11-04 | 2015-05-13 | 凌巨科技股份有限公司 | Composite driving circuit for display touch panel |
| TWM528507U (en) * | 2015-05-29 | 2016-09-11 | 凌巨科技股份有限公司 | A display touch panel with a composite circuit |
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